(S)-(−)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole

Abstract

In the chiral title compound, C38H28O4P2, the intra­molecular P⋯P separation is 3.671 (2) Å and the dihedral angle between the two benzene rings in the biphenyl unit is 77.9 (2)°.

Double-Model Decay Strategy Integrating Persistent Photogenic Radicaloids with Dynamic Circularly Polarized Doublet Radiance and Triplet Afterglow

“…Interestingly, (R)-SEGPHOS crystallizes in the chiral P2 1 2 1 2 1 space group with a regular dodecahedron prism (Figure 4d,e). 63 Although the experimental angles between crystal faces are in accordance with theoretical values, the crystal shape slightly deviates tetrakaidecahedron from BFDH theory (Figure 4g), 64 arising from the distinct growth speed between the ideal crystal and the actual crystal. This partly slow growth of crystal face families {(−1 0−1) (−1 0 1), (1 0 1), (1 0−1)} and fast progress of {(−1 1 0), (−1−1 0), (1 1 0), (1−1 0)} facilitate D 2h symmetry of the dodecahedron (Figure S52).…”

“…In view of single-crystal diffraction data and uniform dodecahedron morphology, the enantiomeric ( R )-SEGPHOS and ( S )-SEGPHOS show a mirrored stereochemical configuration with almost the same crystallographic and structural parameters (Figures S29–S36 and Tables S1–S3). Interestingly, ( R )-SEGPHOS crystallizes in the chiral P 2 1 2 1 2 1 space group with a regular dodecahedron prism (Figure d,e) . Although the experimental angles between crystal faces are in accordance with theoretical values, the crystal shape slightly deviates tetrakaidecahedron from BFDH theory (Figure g), arising from the distinct growth speed between the ideal crystal and the actual crystal.…”